-----Original Message----- From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On Behalf Of Ron Hawkins Sent: Thursday, March 04, 2010 1:06 PM To: IBM-MAIN@bama.ua.edu Subject: Re: Defrag
Steve, That's not exactly correct. It's 16 extents for 59 volumes and then you're done. John's answer is the solution for your problem. ACC and STOP-X37 users have known this for 30 years. I have no idea what "reclaiming space in the VTOC" is. <SNIP> AFAIK, you are limited to 16 extents on a volume (NON-VSAM, PDS, DAM, etc.). If you are allowed (or can) do multi-volume, then yes, you get 16 [max] per volume for 59 volumes. Reclaiming space in the VTOC: If I can get all my space consolidated to just the DSCB #1, then all the other DSCBs (model 3s) become available, giving space for more allocations in the VTOC. If I remember correctly, there can be up to 4 Model 3 DSCBs to get you to 16 extents (for a data set) -- (non-VSAM, PDS, DAM, PS, etc.). Otherwise, once you have used up all the DSCBs in the VTOC, you can't allocate anything more, or even get a secondary extent on that volume. So defragging does recover space for a VTOC. Regards, Steve Thompson ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
